Drawing instrument.



T, K. PIGGOTT.

DRAWING INSTRUMENT. APPLICATION FILED 1111113, 19091 996,359, 1 PatentedJune 27,1911.

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noentm T. K. PIGGOTT.

DRAWING- INSTRUMENT: APPLIUATION FILED APR.13, 1909.

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THOMAS KIRKWOOD PIGGOTT, OF PUYALLUP, WASHINGTON, ASSIGNOR T0 ACMECOMBINATION RULE COMPANY, OF PUYALLUP, WASHINGTON, A CORPORATION OFWASHINGTON.

DRAWING INSTRUMENT.

Specification of Letters Patent. Patented June 27, 1911 Applicationfiled April 13, 1909. Serial No. 489,605.

To all whom it may concern: 1

Be it known that I, THOMAS K. PIGGOTT, a citizen of the United States,residing at Puyallup, in the county of Pierce and State of Washington,have invented new and useful Improvements in Drawing Instruments, ofwhich the following is a specification.

The present invention relates to drafting instruments, and has for itsobject to provide a device of this nature which will embody a number ofdifferent articles in compact and convenient form, thereby adaptlng theappliance for a variety of uses.

The invention relates more particularly to the joint between the lugs,and a finger piece associated with the oint which under certainconditions may be turned out of the way and under other conditions maybe brought into position as when using the device as a compass ordivider.

The invention also supplies a number of different parts which may beinterchanged depending upon the particular work and upon the capabilityof the instrument.

The invention also further consists in the novel features, details ofconstruction and combination of parts which hereinafter will. be moreparticularly set forth, illustrated and finally claimed.

Referring to the accompanying drawings, forming a part of thisspecification Figure 1 is a side view of the instrument adapted for useas a rule. Fig. 2 is a sectional view of the sleeve and the partscarried thereby embodying a pen point and.

pencil and an ink and pencil eraser. Fig. 3 is a side view of anattachment comprising a glass cutter and a centering pin. Fig. 4 is aside view of a member of the instrument having the gage partly withdrawnadapting the same for use as a caliper. Fig. 5 is a sectional view onthe line m-m of Fig. 4. Fig. 6 is a view in elevation of the instrumentas it appears when folded. Fig. 7 is a view of the instrument whenadapted for use as a compass or divider. Fig. 8 is a sectional detailview of the joint between the members or legs of the instrument on theline yy of Fig. 7. Fig. 9 is a modified form of joint between themembers and finger piece, the members being in section and moved to analining position and the finger piece lying in the space formed betweenthe forked ends of the members.

Corresponding and like parts are designated in the drawings by similarreference characters.

The instrument comprises two members 1 and 2 which constitute legs whenthe device is adapted for use as a compass or divider. The members 1 and2 may be of any length or construction and the outer edge of each isstraight and one side is supplied with graduations thereby enabling theinstrument to be used as a rule or straight edge as indicated mostclearly in Fig. 1. The members 1 and 2 are pivotally connected at theirinner ends each being provided with an ear or lug 3 arranged to extendinward and widened and approximately of circular outline. The ears orlugs 3 overlap and are centrally perforated to receive a pivot pin orfastening 4. The ears or lugs 3 are deflected laterally to enable themembers 1 and 2 to aline perfectly when extended so as to form acontinuous straight edge. A finger piece 5 is also fitted to the jointand is'connected to the overlapped cars by means of the pivot fastening4. The finger piece 5 consists of a rounded portion forming agrip and ahead at one end of the rounded portion corresponding approximately tothe ears or lugs 3 and placed along side of said lugs and connectedthereto by the fastening 4. The finger piece is adapted to be turned soas not to interfere with the free use of the instrument when used as arule or straight edge and is adapted to lie between the members when thelatter are folded as indicated most clearly in Fig. 6. When theinstrument is adapted for use as a compass or divider, the members 1 and2 are turned to provide the divider legs as indicated in Fig. 7 and thefinger piece 5 is moved to a position so as to project vertically abovethe joint to be grasped between the thumb and finger of the hand in thewell-known manner to admit of twirling the instrument when striking thecircle.

Sleeves 6 and 7 are provided at opposite ends of the instrument and arelocated upon the same side of the members 1 and 2 as the lugs 3 so asnot to interrupt the straight edge of the device when used as a rule.The sleeves 6 and 7 may be provided upon the respective members in anyeconomical and substantial way. It is preferable, however, to constructthe sleeves 6 and 7 as a part of the respective members and in thisformation each member 1 and 2 is constructed of a strip of metal whichis folded upon itself intermediate of its longitudinal edges, each ofthe strips having extensions at one end which form sections of thesleeves as indicated most clearly in Fig. 5. It is to be understood thatthe sleeves are adapted to extend and possess a certain amount of springaction so as to securely grip the article placed therein with suflicientfriction to prevent displacement. One of the sleeves 7 is provided witha blade 8 forming in effect a pencil sharpener. When the members 1 and 2are folded as indicated in Fig. 6, the joint, finger piece, sleeves, andattachments fitted to said sleeves all come between said members and areprotected thereby.

The, attachment indicated in Fig. 2 consists of a tube 9 adapted toreceive holders 10 and 11 the latter being provided with a pencil point12 and a pencil eraser 13, and the holder 10 being supplied with a penpoint 1 1 and an ink eraser 15. The tube 9 is adapted to be inserted inthe sleeve 6 in positionwith either the pen or the pencil pointprotruding into operative position. It is to be understood that eitherof the holders 10 and 11 may be reversed with reference to the tube 9 tobring either of the parts 12, 13, 14C or 15 into operative position.

The attachment shown in Fig. 3 comprises a holder 16 having a glasscutter 17 at one end and a centering point 18 at the opposite end. Thisattachment is adapted to be fitted into the sleeve 7 with either part 17or 18 projecting. When theinstrument is not required for use, theholders 9 and 16 are slipped into the inner ends of the respectivesleeves 16 and 7, but when anyone of the devices is required for use,the parts 19 or 16 are fitted into the outer ends of the sleeves withthe ends protruding beyond the members 1 and 2 having the devices inposition required for use.

To enable the instrument to be used as a caliper or gage, the slide 19is fitted into one of the members, the folded portions be ing spacedapart a distance corresponding to the thickness of the slide 19 asindicated most clearly in Fig. 5. The slide 19 is graduated and isformed at its outer end with a lateral extension 20 to engage with aside of the work to be measured. The friction between opposing sides ofthe slide 19 and member receiving said slide is sulficient to retain theslide in the adjusted or required position.

It will be understood from the foregoing that the invention provides aninstrument adapted for a variety of uses and one in which severalattachments are retained in position for immediate use and whichattachments are not in the way when the instrument is adapted for anyoneof the several purposes for which designed. Particular attention isdirected to the joint between the members and to the arrangement oft-hefinger piece which may be moved to a position to be out of the wayor adjusted into such position to be conveniently grasped when it isrequired to use the instrument either as a compass or divider.

Having thus described the invention, what is claimed as new, is

1. An instrument of the character described comprising cooperatingmembers, each member having a lug at one end projected laterally inwardtherefrom, said lugs having their outer ends overlapped and being of alength to space the members at their pivot ends when folded, a pivotfastening connecting the overlapped ends of the lugs, and a finger piecemounted upon the said pivot fastening and adapted to lie in the spaceformed between the members when the latter are folded or to projectbeyond the pivot ends of the members when the instrument is adapted foruse as a compass or divider.

2. In an instrument of the character set forth the combination ofcompanion members, each member having a laterally extending lug at oneend, said lugs having their outer ends overlapped and being of alengthto space the pivot ends of the members apart when folded, a pivotfastening connecting the overlapped ends of the lugs, said pivotfastening being in line with the extremities of the members adjacentthereto whereby said members may abut when made to aline, and a fingerpiece mounted upon said pivot fastening and adapted to lie between themembers when folded or to be projected beyond the extremities thereofwhen the instrument is used as a compass or to lie wholly to one side ofthe members when the latter aline, as when used as a ruler.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS KIRKWOOD PIGGOTT.

Witnesses:

B. W. HOLEMAN, J. J. TAYLOR.

Copies 01' this patent may be obtained for five cents each, byaddressing the Commissioner of Patents.

- Washington, D. C.

